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6ES5431-7LA11

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The Siemens 6ES5431-7LA11 is an industrial digital input interface module for SIMATIC S5-115U and S5-115H programmable logic controllers. This module is designed to handle 24/48 V UC signal levels.
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Technical specifications for 6ES5431-7LA11

  • Manufacturer:
    Siemens
  • Part Number:
    6ES5431-7LA11
  • Product Family:
    Siemens Simatic S5
  • Product Type:
    Digital Input Module
  • Stock:
    1
  • Product Type:
    Digital Input Module
  • Number of Inputs:
    16 inputs
  • Galvanic Isolation:
    optocoupler, isolated in groups of 4
  • Rated Input Voltage:
    24/48 V UC
  • AC Frequency Range:
    47 to 63 Hz
  • Input Voltage for "0" Signal:
    0 to 5 V
  • Input Voltage for "1" Signal:
    13 to 60 V
  • Input Current for "1" Signal:
    8.5/10.5 mA typical
  • Input Delay (0 to 1):
    2 to 13 ms
  • Input Delay (1 to 0):
    10 to 25 ms
  • Cable Length Unshielded Max:
    600 m (1968 ft)
  • Cable Length Shielded Max:
    1000 m (3280 ft)
  • Insulation Voltage Rating:
    60 V AC (in acc. with VDE 0160), tested at 500 V AC
  • Internal Current Consumption (5V DC):
    Max. 5 mA
  • Power Loss:
    9.0 W typical
  • Front Connector:
    24-pin
  • Weight:
    0.7 kg
  • Tariff Code:
    8537101190
  • Country of origin:
    Germany
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Applications Diagnostics Installation & Integration Efficiency

Features:

  • 16-channel binary signal interface built for industrial PLC process automation.
  • Flexible universal current design accepting both alternating and direct input voltages.
  • Built-in optical isolation safeguarding internal processing logic from plant ground loops.
This unit is supplied as an authentic Siemens 6ES5431-7LA11 digital input module in original new-surplus or fully tested refurbished condition, delivered ready for immediate system deployment.

The module serves as a critical bridge between physical field sensors and the central processor, converting external switch states into digital CPU memory image updates.

When integrating into existing racks, ensure proper front connector seating and verify that total cable distances conform to standard industrial noise suppression guidelines.

The Siemens 6ES5431-7LA11 is a legacy product fully supported with genuine quality inspection by the manufacturer (OEM).
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Detects binary limit positions and emergency stop pushbuttons in heavy manufacturing lines.
  • Monitors process valve feedback and pressure switch states across automated chemical plants.
  • Gathers equipment operational statuses in central control panels and remote expansion racks.
  • Front-panel light indicators allow technicians to quickly verify input activity during commissioning.
  • Optocoupler barriers prevent high-voltage field spikes from crossing into sensitive backplane logic.
  • High dielectric insulation compliance safeguards the control system against electrical noise surges.
  • Slides smoothly into any standard SIMATIC S5 subrack slot without special mounting hardware.
  • Front terminal connection design enables fast field wiring removal without disturbing adjacent I/O modules.
  • Can be adapted for use in larger system chassis configurations using standard system expansion casings.
  • Optimized backplane power draw minimizes total cabinet heat generation during continuous operation.
  • Hardware signal filtering stabilizes input readings against chatter from mechanical switch contacts.
  • Supports reliable long-distance field sensor connections across extensive factory floor layouts.
Description
Siemens 6ES5431-7LA11 is an industrial-grade digital input module purpose-built for SIMATIC S5-115U and S5-115H programmable logic controller racks. Operating as a robust signal gateway, it safely translates binary state changes from external field instruments into logic-level signals required by the central processing unit. The unit houses 16 discrete input channels segmented into 4 electrically isolated groups, delivering effective noise suppression to safeguard internal controller electronics from line transients.

Engineered for multi-voltage flexibility, the Siemens 6ES5431-7LA11 accommodates an operational input voltage range of 24/48 V UC at line frequencies between 47 and 63 Hz. Optical coupling technology isolates each input circuit, allowing accurate signal transmission over extended field cable runs up to 1000 meters. The module faceplate incorporates front-mounted green LED status indicators, giving plant operators clear, real-time visual monitoring of all input state transitions.

Designed for compact installation, the Siemens 6ES5431-7LA11 occupies a single slot in standard S5-115U subracks and interfaces with field wiring using a detachable 24-pin front terminal block. Drawing a minimal 5 mA from the internal 5V DC backplane, it ensures low thermal output and high energy efficiency in continuous industrial processing, machine control, and automated plant environments.
Alternative Names
6ES54317LA11 6ES54317LA1 6ES5 431-7LA11 6ES5-431-7LA11 6ES5430-7LA11 6ES5431-7LA1 Siemens 6ES5431-7LA11 Siemens 431-7 Digital Input Module
Technical notes
For field wiring integration, the Siemens 6ES5431-7LA11 connects through a 24-pin front connector and provides instant optical visual diagnostics via individual green channel LEDs on the front panel.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
How does the Siemens 6ES5431-7LA11 isolate field signals from internal PLC backplane logic?
The Siemens 6ES5431-7LA11 uses onboard optocouplers to provide galvanic isolation across 4 channel groups with a 500 V AC test rating.
Does the Siemens 6ES5431-7LA11 support AC line frequency operation?
Yes, for AC input signals, the Siemens 6ES5431-7LA11 supports supply frequencies ranging from 47 to 63 Hz.
In which SIMATIC S5 subracks can the Siemens 6ES5431-7LA11 be installed?
The Siemens 6ES5431-7LA11 is natively designed for SIMATIC S5-115U, S5-115H, and S5-115F programmable controller subracks.
How do operators inspect the channel status on the Siemens 6ES5431-7LA11?
Green LED status indicators located on the front panel display real-time signal activity for each input channel.
Is the Siemens 6ES5431-7LA11 compatible with non-redundant SIMATIC S5-115U subracks?
Yes, the Siemens 6ES5431-7LA11 is fully compatible with standard non-redundant SIMATIC S5-115U subracks as well as fault-tolerant S5-115H and fail-safe S5-115F systems.
How can I get a price quotation or order the Siemens 6ES5431-7LA11?
You can request an official price quote by submitting an RFQ directly to our sales office with your required part quantity and shipping requirements.

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